diff -r 224af797b1f9 -r f7e2df85fc0a src/luan/modules/Binary.luan
--- a/src/luan/modules/Binary.luan	Mon Mar 28 18:00:12 2022 +0200
+++ b/src/luan/modules/Binary.luan	Tue Mar 29 16:07:01 2022 -0600
@@ -10,10 +10,8 @@
 Binary.base64_encode = Base64.getEncoder().encodeToString
 Binary.binary = BinaryLuan.binary
 Binary.byte = BinaryLuan.byte_
+Binary.digest_message = BinaryLuan.digest_message
+Binary.to_hex = BinaryLuan.to_hex
 Binary.to_string = BinaryLuan.to_string
 
-function Binary.digest_message(algorithm,input)
-	return MessageDigest.getInstance(algorithm).digest(input)
-end
-
 return Binary

diff -r 224af797b1f9 -r f7e2df85fc0a src/luan/modules/BinaryLuan.java
--- a/src/luan/modules/BinaryLuan.java	Mon Mar 28 18:00:12 2022 +0200
+++ b/src/luan/modules/BinaryLuan.java	Tue Mar 29 16:07:01 2022 -0600
@@ -1,6 +1,8 @@
 package luan.modules;
 
 import java.io.UnsupportedEncodingException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 import luan.Luan;
 import luan.LuanTable;
 import luan.LuanFunction;
@@ -55,4 +57,16 @@
 		return charsetName!=null ? new String(binary,charsetName) : toString(binary);
 	}
 
+	public static byte[] digest_message(String algorithm,byte[] input) throws NoSuchAlgorithmException {
+		return MessageDigest.getInstance(algorithm).digest(input);
+	}
+
+	public static String to_hex(byte[] a) {
+		StringBuilder sb = new StringBuilder();
+		for( byte b : a ) {
+			sb.append( String.format("%02x",b) );
+		}
+		return sb.toString();
+	}
+
 }

diff -r 224af797b1f9 -r f7e2df85fc0a src/luan/modules/String.luan
--- a/src/luan/modules/String.luan	Mon Mar 28 18:00:12 2022 +0200
+++ b/src/luan/modules/String.luan	Tue Mar 29 16:07:01 2022 -0600
@@ -5,6 +5,7 @@
 local String = {}
 
 String.char = StringLuan.char_
+String.digest_message = StringLuan.digest_message
 String.encode = StringLuan.encode
 String.find = StringLuan.find
 String.format = StringLuan.format

diff -r 224af797b1f9 -r f7e2df85fc0a src/luan/modules/StringLuan.java
--- a/src/luan/modules/StringLuan.java	Mon Mar 28 18:00:12 2022 +0200
+++ b/src/luan/modules/StringLuan.java	Tue Mar 29 16:07:01 2022 -0600
@@ -1,5 +1,6 @@
 package luan.modules;
 
+import java.security.NoSuchAlgorithmException;
 import java.util.Arrays;
 import java.util.regex.Pattern;
 import java.util.regex.Matcher;
@@ -236,4 +237,10 @@
 		return s.split(pattern,n);
 	}
 
+	public static String digest_message(String algorithm,String input) throws LuanException, NoSuchAlgorithmException {
+		Utils.checkNotNull(algorithm,1);
+		Utils.checkNotNull(input,2);
+		return BinaryLuan.to_hex( BinaryLuan.digest_message( algorithm, input.getBytes() ) );
+	}
+
 }

diff -r 224af797b1f9 -r f7e2df85fc0a src/luan/modules/url/LuanUrl.java
--- a/src/luan/modules/url/LuanUrl.java	Mon Mar 28 18:00:12 2022 +0200
+++ b/src/luan/modules/url/LuanUrl.java	Tue Mar 29 16:07:01 2022 -0600
@@ -25,6 +25,7 @@
 import luan.LuanJavaFunction;
 import luan.LuanException;
 import luan.modules.IoLuan;
+import luan.modules.StringLuan;
 import luan.modules.Utils;
 
 
@@ -379,15 +380,11 @@
 		return path;
 	}
 
-	// retarded java api lacks this
 	public static String md5(String s) {
 		try {
-			byte[] md5 = MessageDigest.getInstance("MD5").digest(s.getBytes());
-			StringBuffer sb = new StringBuffer();
-			for( byte b : md5 ) {
-				sb.append( String.format("%02x",b) );
-			}
-			return sb.toString();
+			return StringLuan.digest_message("MD5",s);
+		} catch(LuanException e) {
+			throw new RuntimeException(e);
 		} catch(NoSuchAlgorithmException e) {
 			throw new RuntimeException(e);
 		}